Hydro booster rebuild kit?

[65 Overlander]

I know that someone makes a rebuild kit for the Hydrobooster, But I cant remember which diesel website I saw it on. I have a new booster in the garage, but I figured the time it takes me to pull it and replace, A few more minutes to replace seals isn't bad because the rebuild kit was around $50
Any info would be great! Thank you in advance!
Jeff,Redding,California